122125189 has 4 divisors (see below), whose sum is σ = 122758156. Its totient is φ = 121492224.

The previous prime is 122125187. The next prime is 122125247. The reversal of 122125189 is 981521221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 981521221 = 6151 ⋅159571.

It can be written as a sum of positive squares in 2 ways, for example, as 22724289 + 99400900 = 4767^2 + 9970^2 .

It is a cyclic number.

It is not a de Polignac number, because 122125189 - 2¹ = 122125187 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 122125189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122125187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316194 + ... + 316579.

It is an arithmetic number, because the mean of its divisors is an integer number (30689539).

Almost surely, 2^122125189 is an apocalyptic number.

It is an amenable number.

122125189 is a deficient number, since it is larger than the sum of its proper divisors (632967).

122125189 is an equidigital number, since it uses as much as digits as its factorization.

122125189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632966.

The product of its digits is 2880, while the sum is 31.

The square root of 122125189 is about 11051.0266038952. The cubic root of 122125189 is about 496.1371523356.

The spelling of 122125189 in words is "one hundred twenty-two million, one hundred twenty-five thousand, one hundred eighty-nine".